#include<bits/stdc++.h>
using namespace std;
int a[110]={0};
int b[110]={0};
int main()
{
    freopen("proposal.in","r",stdin);
    freopen("proposal.out","w",stdout);
    int n,ans,i,j;
    cin>>n;
    ans=0;
    for(i=1;i<=n;i++)
    {
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    for(i=1;i<=n;i++)
    {
        cin>>b[i];
    }
    sort(b+1,b+n+1);
    for(i=n;i>=1;)
    {
        if(a[i]>b[i])
        {
            for(j=n;j>1;j--)
            {
                a[j]=a[j-1];
            }
            a[1]=1;
            ans++;
        }
        else
        {
            i--;
        }
    }
    cout<<ans;
    return 0;
}